Ethereal fails to properly decode ISDN User Part (ISUP) packets containing an overly long Interworking Function Address (IWFA) value.
Ethereal is a network traffic analysis package. It includes the ability to decode packets containing ISUP data. There is a vulnerability in the way the ISUP protocol dissector decodes the IWFA value. By sending an ISUP packet containing an overly long IWFA value, a remote, unauthenticated attacker could execute arbitrary code.
A remote, unauthenticated attacker could execute arbitrary code on the vulnerable system.
Upgrade to version 0.10.3 or later.
Note: Ethereal is considered BETA software at this time.
If you are unable to upgrade to version 0.10.3 or later, you can disable the ISUP protocol dissector by performing the following actions in Ethereal:
(for Ethereal versions 0.9.x)
1) Select Edit->Protocols
2) Deselect the ISUP protocol dissector from the list
(for Ethereal versions 0.10.x)
1) Select Analyze->Enabled Protocols
2) Disable the ISUP protocol dissector from the list by unchecking its "Status" checkbox
However, it is strongly encouraged to upgrade to version 0.10.3 or later.
Vendor| Status| Date Notified| Date Updated
Ethereal| | -| 25 Mar 2004
If you are a vendor and your product is affected, let us know.
Group | Score | Vector
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | N/A | N/A
Ethereal credits Stefan Esser for reporting this vulnerability.
This document was written by Damon Morda.